From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D963AC433E0 for ; Sat, 11 Jul 2020 17:27:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BAD302078B for ; Sat, 11 Jul 2020 17:27:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="aOL1heFQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728691AbgGKR1y (ORCPT ); Sat, 11 Jul 2020 13:27:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38122 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728507AbgGKR1x (ORCPT ); Sat, 11 Jul 2020 13:27:53 -0400 Received: from mail-lf1-x144.google.com (mail-lf1-x144.google.com [IPv6:2a00:1450:4864:20::144]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3E7DCC08C5DD for ; Sat, 11 Jul 2020 10:27:53 -0700 (PDT) Received: by mail-lf1-x144.google.com with SMTP id k17so5016135lfg.3 for ; Sat, 11 Jul 2020 10:27:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=WT5If22sLaMPwYvd2aUV89SMReFctlqwpoNyy327+N8=; b=aOL1heFQeqiKinpPUMjMjc9jJYIKtXbUtHLKxfkNHEMtr57W5VoqmqeG4iVDWaOm6m viRFkgNqyVE/8Uxjzpz6FWkO7DvUs9dguymc3cng8XxqvIsndwZtoNtvPIZ7X2NflYP9 u+VLfQ4fIU84dJLfEvHh9pb3mWBR3aPdi+zwQLXciITSYcnd1vwbGqhMMxGp2yjFgQDG TkC/neU3A4butD9FHcisZH/z4n0Oae08Q/E2fQb0qJrI13xaPg1PZeQBITxe+6I31ROR K0i3UBnKymFop6u8GnnD799cEhW0EKEwaxE/Fz7Pc93devszFWG4RcJMDemwf59mgWQL LugA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=WT5If22sLaMPwYvd2aUV89SMReFctlqwpoNyy327+N8=; b=ae7yHHJsPUK81KqSNvcESd7X5AbQW3Kb9sVQ3vekeWMER67QWmI/BFLF5Gv4Jb6E7b t5rW+5yfIIVnZwoGSYGv2mg6hEBeIbcwJfaVelhB0ivFG84OrzJfKGbiTxX/Bbhv6U9/ uJB6v7fXcakhorRottPUhJrtGplqeRPM4u7EkdCygBUADCLnluKbrJqVFRM/UgUK1jML Kln1/KzagOjNfJeY5KuXAGuNpRJJIb56hi4Oq1M6LOdnieE2BIffyU0aCkstaXp3wSDs 99r9ga+0hZPtRtPmQVGyRD1OzQj50psB2GYiBYGmTCxiNQD5aD6kqwO8C0fV8hJCAImW GWbg== X-Gm-Message-State: AOAM531lJpSAYVr2POA0OjAnIP0YuknUMF5GN0mvL/Gnsbf+19UnT4WX zgadIu9dbTgMbJwT2RVy7wSDZBjB4K+JD7+BWDLvZg== X-Google-Smtp-Source: ABdhPJzyuQC9nNuJW74kQTfO9OTzPQaq3SEObRbW8jRoAavJBh0wA61Wit3kCDkbVEL4KIJMrlobAElUlQJjcmk/RcI= X-Received: by 2002:ac2:5325:: with SMTP id f5mr47009377lfh.6.1594488470333; Sat, 11 Jul 2020 10:27:50 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Naresh Kamboju Date: Sat, 11 Jul 2020 22:57:38 +0530 Message-ID: Subject: Re: WARNING: at mm/mremap.c:211 move_page_tables in i386 To: Linus Torvalds , Joel Fernandes Cc: "Kirill A. Shutemov" , William Kucharski , linux- stable , open list , linux-mm , Arnd Bergmann , Andrew Morton , Roman Gushchin , Michal Hocko , lkft-triage@lists.linaro.org, Chris Down , Michel Lespinasse , Fan Yang , Brian Geffon , Anshuman Khandual , Will Deacon , Catalin Marinas , pugaowei@gmail.com, Jerome Glisse , Greg Kroah-Hartman , Mel Gorman , Hugh Dickins , Al Viro , Tejun Heo , Sasha Levin Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 11 Jul 2020 at 01:35, Linus Torvalds wrote: > > On Fri, Jul 10, 2020 at 10:48 AM Naresh Kamboju > wrote: I have started bisecting this problem and found the first bad commit commit 9f132f7e145506efc0744426cb338b18a54afc3b Author: Joel Fernandes (Google) Date: Thu Jan 3 15:28:41 2019 -0800 mm: select HAVE_MOVE_PMD on x86 for faster mremap Moving page-tables at the PMD-level on x86 is known to be safe. Enable this option so that we can do fast mremap when possible. Link: http://lkml.kernel.org/r/20181108181201.88826-4-joelaf@google.com Signed-off-by: Joel Fernandes (Google) Suggested-by: Kirill A. Shutemov Acked-by: Kirill A. Shutemov Cc: Julia Lawall Cc: Michal Hocko Cc: William Kucharski Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index e260460210e1..6185d4f33296 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -172,6 +172,7 @@ config X86 select HAVE_MEMBLOCK_NODE_MAP select HAVE_MIXED_BREAKPOINTS_REGS select HAVE_MOD_ARCH_SPECIFIC + select HAVE_MOVE_PMD select HAVE_NMI select HAVE_OPROFILE select HAVE_OPTPROBES After reverting the above patch the reported kernel warning got fixed on Linus mainline tree 5.8.0-rc4. -- Linaro LKFT https://lkft.linaro.org